Meadowphysics generates notes. To get sound you’ll need to click the plugin dropdown to select an internal synth plugin. You can likewise change the output to MIDI and change the midi dropdown to either an external or internal MIDI device (for example, on Mac the AU DLS Synth will make piano sounds.)

If you’re looking for other quick ways to make sounds, load any of the other patchers:

corners: physics curve cradle machine, creates MIDI notes when a “puck” hits a side of the grid and sends MIDI cc for position and acceleration

flin: falling polyrhythm machine, 16 columns of notes which travel the grid at varying speeds and with adjustable length